Bellone, J. I. and Colonna, M. and Gambacurta, D. and Lenske, H. (2024) Theoretical modelling of Heavy Ion Double Charge Exchange reactions and calculations for the NUMEN project. Il nuovo cimento C, 47 (6). pp. 1-6. ISSN 1826-9885
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Abstract
Double Charge Exchange nuclear reactions induced by Heavy Ions (HIDCE) are discussed, focusing on the scenario where these processes are described as two-step direct reactions and, in particular, as an incoherent sequence of two single charge exchange reactions (Double Single Charge Exchange, DSCE). HIDCE reactions share fundamental characteristics, such as the spin-isospin transition operator, with the elusive neutrinoless double beta decay. Hence, the study of this kind of reactions could allow to get information on the Nuclear Matrix Element (NME) involved in double beta decay rate. Second order DWBA allows to describe Heavy Ion DSCE reaction amplitude in terms of distortion factors, storing information on initial and final state ion-ion elastic interactions, and nuclear matrix elements. The latter are determined within QRPA theory. The formalism adopted to describe DSCE transition form factors is discussed, focusing on the approximations allowing to get disentangled projectile and target NMEs within DSCE cross section expression. Results are shown for the DCE reactions 40Ca (18O, 18Negs) 40Args, 76Se (18O, 18Negs) 76Gegs and 76Ge(20Ne,20Ogs)76Segs, studied within the NUMEN collaboration with a beam energy of 15.3 AMeV.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 10 Feb 2025 13:46 |
| Last Modified: | 10 Feb 2025 13:46 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23394 |
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